Railway-car brake.



G. M. HOADLBY.

RAILWAY 0A3 BRAKE. uruonxo: mum in 11. non.

Paloma! Oct 19, 1909.

I EEZITHIKST 1.

WITNESSES.-

uvrbwrom 62070 171.

A'Y-TORNFY 6. ll. KOABLHK IAILWA! 0A! nun.

. APPLIOATXOI "LSD IA! 11. 1!. 937,069. Patented 00.19.1009. IBJBlll-IIIII' a.

. WITNESSES:

[.YVENTOR, 'mye/Mfihrdlq, B Y T ATTORNEY.

of ev by whereby the UNITED sirncrnsra rnn'r osmcs.

ozonon I. HOADLEY, 0F SPRINGFIELD, MASSACHUSETTS. ABSIGNOB. BY MESNE Al-$- smmn'rs, TO HOADLEY BRAKE SHOE COHPAN'Y. OF SPRINGFIELD. MASSACHU- Em, A CORPORATION OF IASBACHUBETTB.

narLwar-onn BRAKE.

lpeelieltlon of Letters Patent.

Patented Oct. 19, 1909.

Application lied lay 17, 1009. Serial No. 06,411.

To all whom it may concern:

Be it known that I, Gnonor. M. Hoanu-zv, a citizen of the United States of'America, and resident of Springfield, in the county of Hampdcn and State of Massachusetts, have invented certain new and useful Improvements in Railway-Car Brakes, of which the following is a full, clear, and exact descriptron.

This invention relates to improvements in a construction of railway car brake shoes and brake-shoe supportin -back or carrying head therefor; and one of t is objects is to provide an improved construction of brake-shoeback and complements] brake-shoes which are susceptible after use of being interchanged so that the one which was initially a rear-brake-shoe may, after a front-brakeshoe has been worn awe and the rear brake shoe more or less worn, for the moment removed from the brake-shoe-back while the fresh rear brake-shoe is being mounted on the back, and then such partially worn shoe (formerly a rear shoe) interlocked on and carried by the newly rovided rear shoe,to the end t at practical? if not absolutely all shoe is sub ected to wear in its utilization for braking purposesno portions or remnants being necessarily thrown away as scrap iron.

Another objectof the invention is to provide formations to the brake-shoe-back and to the brake-shoe which is to be carried therearts may have interlocked en ements which are reliable and suitable for t to retention of the shoe on the back, with no liability ofdisplacement and without requirement of keys or other fastenin devices which are made separate from, or a ditlonal to, the brake-shoe and the brake-shoe back.

Another object of the invention is to provide similar means for the interlocking engagements of the complemental shoes one with the other.

Other objects of the invention are to generally improve and simplify the constructions of the several members of the brake device all as will hereinafter up or.

-'Ihc invention consists in t 1e combination and arrangement of peculiarly constructed brake-shoe members and the brakc-shoe-back or carrying head all substantially as hereinafter fully described in conjunction with the accompanying drawings and as set forth in the claims.

In the drawin :-Figure 1 is a side elevation of a brake-s oe-back and front and rear shoes with, furthermore, an cdgcwisc portion of a car wheel; Fig. .2 is a ross section on line 2- 2, Fig. 1; Fi 3 is a face view of the brake-shoe back an Fig. 4 is a pcrspcw tive view of the brake-shoe back and the rear and front shoes in separated relations. Figs. 5 and 6 are cross sectional views similar to Fig. 2. but showing modified cross sectional forms of the members of the brake device.

In the drawings A re )resents a carrying head or brake-shoe-back aving a )propriate provision for attachment to a bra e beam B as usual, and made with its front face curved from end to end on an arc of a circle of a shorter radius than that of the riphery of the car wheel C with which the rake device is to coact.

D and E represent what in their relations shown constitute the rear and front shoes respectively.

As concerns the brake-shoe-back and the brake-shoe directly carried thereby, the one has a dove-tail groove opening at its edge and extending obliguely crosswise and opening to the face 0 the member, while the ot er has a dove-tail rib projecting outwardly from, and extending correspondingly obliquely crosswise of, its face for a gramtative interlocking engagement in such provided, the brake-shoe-back has two of the edgewise opening crosswise and obli uely extending grooves u. a which are of ovetail shape and tapered in their lengths, while the rear brake-shoe D has at its back two dove-tail shaped ribs b bextendin crosswise but more or less oblique correspon ing to the inclinations of the grooves ,a a for the interlocking engagements therein; and by reason of the fact that the grooves and l'lbS have their slants from their edge portions more or less downwardly relative] to the curved lengths of the brake-shoeuck and shoe, a gravitativo tendency is induced for causing the shoe to have its ribs settled well into the e I a independent or slty of place on the back- Dhasinitsfrontfacecrossvivise and 133d or [sired obliquely extendigg ove-tai ta grooves a a lrectly o posits the dove-tail ribs 6 I; which are at e back of the shoe, the same being as to relation, form and dimension, the exact counterparts of those in the brakc-suoe-baclr; and the front brake-shoe E has at its rear face crouwise extend' and oblique dovetail shaped ribs b which are the counterparts of those b for the rear-brske-shoe D.

The brake-shoe-back, the rear and front faces of the rear shoe, and the rear face of the front shoe are formed of etc shape as indicated at (id in 2,8 an 4, so that there will be limitations of the sliding movements of each part relatively to the next when brought to their dove-tail rib and gzoove-interloc ing engagements' and the ck faces of the dove-tail ribs and the bases of the dove-tail grooves may be of similar step shape, although in practice the step-like formation may be carried out only on the faces of the complemental parts or at their interlocking rib and groove portions.

As indicated in Figs. 5 and 6, the brakeshoe-back having the rent face of arc shape, as to its length, is formed with a w channel f between its lateral edges, the same bemg' understood as extending from end to end of the member; the rear rake-shoe has its rear face made ex anded from its lateral edges to its longitu mal central line to fit the nnel of the shoe, and its front face has a annel f between its lateral edges co ding to that in the brake-shoe-hack, while the front-brake-shoe made of a form the same as the back face of the rear shoe to fit in the front channel of the rear shoe.

After the front shoe for a considerable portion of its thickness by its action on the car wheel, the rear shoe wi at its end portions and ad'Lacent its 0 posits become for on on the ear wheel and to receive the wear therefrom; and, of course, as the result of the brake device is protracted the front shoe will be entirely worn away and the rear shoe considerably worn and very much reduced its thickness; and before the comes too far c it will be removed from the brake-shoegrzk, a fresh rear shoe having a form like that which the already worn rear shoe 0" y had'may be replaced therefor and e much worn was formerly employed as the bebrouqit to its interlocking and e'mp oyed as a' front shoe an until it in its turn is entirely worn awa In Figrfi the walls of the I Eachshoe has been worn away se tel rovided wil done: the brag-: hoe will be rewhile in Fig. 6

in its mm, maintain are formed by relatively to surfaces which are ccnvsr t each other at obtulsang' es;

the walls of the correspondchannels are shown as formed by curved surfaces; d in these forms of the device the pivots grooves a and a", and the interloclnngribe b and b extend from one of the respective parts more or let. obliqu y not more than half way across the widths thereof. A

The brake shoe devices PM in Fig l to 4 inclusive poQess in many characteristics of the .inventlon ribed and claimed in my map lication for Letters Patent of the Uni hes filed'Oct. B2 1908, No. 459,042, with, however, additional structural features and arrangements which have been hereinabove particularly described and which are cov by some of the appended claims.

It is preferable to employ a plurality of the interlocking ribs and grooves made as features or appurtenances of the brake-shoe back end the complemental shoes'D and E for the reason, especially, that the brake in many cases is so set relativel to the wheel and is so applied for its braking action on the wheel t at the'qne end of the brake-shoe is in action and receives wear for a considerable period before the time throu hout its entire becomes conform to the wheel; an therefore even although one end portion 0 the front brakeshoe ma be entirely worn away on a curv ,line inc ining to the neral length of such shoe so that the inter 0c connection for the shoe at such end portion m I rearshoebe mg ent hol means for the'remainder of the shoe at its r end rtion. I claim 1. The combination of a orake-hhoe-hack or ing-head, and a brake-shoe, one havcarry i a dove-tail groove at its one as, extending obli if; crosswise and o ingqlo the face 0 ths member, while other has a dove-tail rib projecting outwardly from and extending ngly crosswise of its face, for a v1 ve interoc saga insnc groove.

2. comination of a rear brake-shoe, and a brake-shoe-back on which it is reancvably .su ported, of a front-brake shoe, one of said oes having a dove-tail at its edge, extending obliquelawcross shoe,

wise and also Opening: the face of while the other shoe a dove-tail rib projectin outwardly from and extcnding'corm s n ingly obliquely crosswise of 1 face, or a gravitative interl engagement in the ve of the coactmfg oe.

8. The cambinat'ion o a brake-sheeting: ing a ove-tai groove 0 a 1 ely ere-wise and also omes sev there still remains an e ,hav f xpanlhgtothefacsof extendingobliu theha'ehwhilsthe gro'ove open-' Oh I cameo ahoe has a dove-tail rib projecting rearwardly from and extending correspondingly obliquely crosswise of its. rear face, for a pantatlvq interlocking engagement in such i groove.

4. The combination of a brake-shoe-back and a brake-shoe, one having a dovetail groove, tapered in its len h, opening at its edge, entendin oblit uc y crosswise and opening to tl= e ace of t w member while the other has a longitudinally tapered dove-tail rib projecting outwardly from and extending correspondingly crosswise of its face, and adapted for an interlocking engagement in such groov'e.

5. The combination of a brake-shoe-auprting member, and a shoe membcr,.the o ne i aving a dove-tail groove opening at its edge, extending crosswise and opening to the face of the member, while the other has a dove-tail rib projecting outwardly from and extending corres ondmgly crosswise of its face, foran inter ockin engagement in'such cove, and said members having step-like ormations in their adjofhed faces whereby the transverse movement of the shoe member relatively to the supporting member is limited.

6. The combination of a brake-shoe-back and a brake-shoe, one having a dovetaii groove opening at its one edge, extending obliquely crosswise and opening to the face of the member. while the other has a dovetail rib projectin; outwardly from and extending correspondingly crosswise of its face. for a gravitutivc interlocking engagement in such grim e. and meamfor limiting the extent of sliding movement which the one member may have in its interlocked relation to the other.

7. The combination of a rear brakeshoe, and a brake-shce-back on which it is removably supported, of a front-brake shoe, one of said shoes having a dove-tail groove opening at its edge, extending oblituely cross- WM and also opening to the shoe, while the other shoe has a dove-tail rib projecting outwardl from and extendng correipondingly ob iquely crosswise of its face, or a gravitative interlocking enggement 1n the groove of the coacting shoe,

0 front face of the back, the front and rear faces of the rear shoe, and the rear face of the front shoe havin corre nding step 56 shaped formations w ereby tie transverse movements of each member relatively to the next is limited.

8. The combination of a brake-shoeck a rear brake-shoe and a front brakeme,

to mid members bein similarly constructed t i l are of th members and means for detachabl of said shoes having a plurality of dove-tail vm opening at its edge, extending ohiquely crosswise and also opening to the face of the shoe, while the ot ier shoe has a plurality of dove-tail rios projoctin outwardly from and extending oorrespon ingly obliquely crosswise of its face for gravitative interlocking engagements in'the grooves of the coacting shoe.

10. The combination with a brake-shoeback, curved in its length and formed with a shallow channel between its lateral ed es, of a rear brake-shoe havin its rear ace formed to fit the channel o the shoe and ham its front face curved in its length and o channelei form llietween its flateral edges eorres n in to mat in tie ace 0 the brake-sii e-bagk, a front brake-shoe, curved in its length and having its rear face of a form to lit the front fuco'clmnncl of the rear shoe, and means respectively for removably connecting the rear shoe to the back and the front shoe to the rear shoe.

11. The combination of a brake-shoe-lmck a rear brake-shoe and a front brake-shoe, all lgving in their lengths a similar curvature 0 an arc of shorter radius than that of the face of the car wheel with which the brake device is to coact,--the brake-shoe-back and the rear shoe having at their front faces channeled formations between their lateral while the front and rear shoes have their back faces of forms corresponding to said channels, and means for detachably connecting the rear shoe to the brake-shoeback and the front shoe to the rear shoe.

12. The combination of a brake-shoe-back a rear brake-shoe and a front brake-shoe, at having in their lengths a similar curvature on an arc of shorter radius than that of the face of the car wheel with which the brake device is to coact,-thc brake-shoe-back and the rear shoe having at their front faces channeled formations between their lateral edges while the front and rear shoes have their back faces of forms corresponding to said channels, mid shoes and back having interlocking dove-tail ribs and grooves which extend obliquely crosswise of the respective members.

13. The combination with a brakershoe having rear and front shoes all curved as to their lenfli, and having channels in their front faces tween their lateral edqs, the rear faces of the front and rear shoes aving forms to fit in said channels of the adjoining connecting the front to the rear shoe an the rear shoe to the back.

Signed by me at L ringfield, Mass, in

with wise open ng obliquely extendingpresence of two subecri in witnesses. I Interior ng dove-tail ribs and grooves. GEORGE HOADLEY.

- 9. The combination of a rear brake-shoe Witnesea: and a breke-shoe-back on which it is remov- Wx. S. Banmws. ti ably supported, of a front-brakeshoa ono Q. R.'"Daiscou.. 

